Spring-hinge



Patented May 3o, |399.

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(No Model.)

MARCUS LANE, OF FREEPORT, ILLINOIS.

SPRING-HINGE.

SPECIFICATION forming part of Letters Patent No. 625,77 9, dated May 30,1899. Application filed .Tilly 29,1898. Serial No. 687,238. (No model.)

To all whom it may concern:

Be it known that I, MARCUS LANE, a citizen of the United States ofAmerica, residing at Freeport, in the county of Stephenson and State ofIllinois, have invented certain new and useful ImprovementsinSpringHinges, of which the following is a specification.

My invention relates to a double-acting spring-hinge for holding a door,adapted to swing both inward and outward, normally closed; and itconsists of certain new and useful features of construction andcombinations of parts hereinafter fully described, and specificallypointed out in the claims.

Referring to the accompanying drawings,

which form a part of this specification, Figure lis a central verticalsection of the hingecase and parts of the hinge. Fig. 2 is a top planView of the hinge with its parts in position to hold a door closed. Fig.3 is a like View of the same, showing the positions assumed by the partsthereof when the door is wide open. Fig. Il is a section at the dottedline 4: 4E in Fig. l of parts there shown.

Like letters of reference indicate corresponding parts throughout theseveral views.

A A' A2 are the base, sides, and top of the hinge-case. The base A has ashort tubular bearing A3 sunk thereinto. The top A2 has a circularbearing A4, extending therethrough, which is prolonged by means of thetubular portion A5 integral therewith.

. B B are cylindrical studs projecting vertically upward from the bottomA of the hinge` case, whereto they are rigidly connected by being castintegral therewith or otherwise.

C is a rock-shaft verticallymounted in the bearings A3 A4 in thehinge-case and provided with lateral projections D D', supporting theVertical pintles E E., the axes of the pintles and rock-shaft all beingin the same vertical plane.

F F are peripherally grcoved pulleys mounted on opposite sides of therock-shaft C on the pintles E E.

G G are bushings freely turning in the pulleys F F and upon the pintlesE E.

Il Il are spiral springs engaging by their upper ends with the groovedperipheries-a preferable form only-of the pulleys F F and connected bytheir lower ends-in this instance intermediately'with the base A of thehinge-case.

I l are ratchet-keys for adjusting the ten- In use the hinge-case andall its contents,

as shown in Fig. l, are so placed .that the upper surface ofthe top A2will be on a level with the 4upper surface of the under or rough floor.Thereafter the upper iioor is so laid as to cover the top A2, extendingover to, around, and to the top of the tubular portion A5.

The hinge-plate J and shank A6 are set into a mortise in the lower endof the door (not shown) to be controlled by the spring-hinge.

I claim and desire to secure by Letters Patent- 1. In a spring-hinge, incombination, a vertically-mounted rock-shaft provided with lateralprojections supporting two vertical pintles, two pulleys mounted, onopposite sides of the rock-shaft, on the vertical pintles and two spiralsprings engaging, by their upper ends, with peripheries of thepulleys,and connected, by their lower ends, with the base of the hinge,substantially as and for the purpose speciied. i

2.' In a spring-hinge, in combination, a vertically-mounted rock-shaftprovided with lateral projectionssupporting two vertical pin#tles-'-the4 axes of the pintles and the rock-shaft all being in the samevertical plane-two pulleys mounted, on opposite` sides of therockshaft,on the vertical pintles,two spiral springs engaging, by theirupper ends, with the peripheries of the pulleys, and connected, by theirlower ends, with the base of the hinge, and the ratchet-keys foradjusting the tension of the spiral springs, substantially as and forthe purpose specified. f.

MARCUS LANE. Witnesses:

L. L. MORRISON, NELLIE BUNKER;

